OK, looks like the 1.8 update fixed that game breaking bug that stopped me from progressing, so I've now been able to complete KOTOR 2...I can see why people were disappointed, especially if the version I saw was in some way improved by TSLRCM. I mean it wasn't *awful* but it was certainly anticlimactic.
The way I see it, the first KOTOR had the much better storyline.
But the sequel had the better gameplay.
I'm a story over gameplay RPG kind of guy. I tend to drop a game pretty fast if I don't care what is happening in it, so I liked the first KOTOR more.